Top Talkers: 47 Republicans sent a warning letter to Iranian leaders about a nuclear deal with the U.S., saying any deal won't last after the president leaves office. The Morning Joe panel discusses. watch

The controversy of Hillary Clinton's email enters its second week with the president discussing the subject in a recent interview and Sen. Dianne Feinstein weighing in. The Morning Joe panel discusses. watch

Top Talkers: Is a series of internal clashes causing the feared ISIS terror group to splinter? A new Washington Post report says 'defections and dissent' have been reported. The Morning Joe panel discusses. watch

President of internet startup PowerToFly, Katherine Zaleski, is getting attention for a new Fortune article where she apologizes to working mothers for how she once treated them. Now a mother, Zaleski joins Morning Joe to discuss. watch